No Working Function Lp/Lm08 - Claas QUANTUM 3500 Service Parts

Hydraulics
4.8.2 No working function
LP/LM08
Fault
No or insufficient pressure
build-up in all consumers
System pressure build-up
Oil supply to one consumer
is too low or too high
Oil supply to all consumers
too low
Oil supply to valve with the
largest flow range is not
achieved
One consumer has no
function
Various valves switch
irregularly
11-100
QUANTUM
Cause
Spool of circulation/pressure relief valve
jams
Pressure pilot control valve does not close
because of
•
Foreign object between seat and
ball
•
Valve seat pressed out
•
O-ring of pressure pilot valve unit
damaged
•
Orifice plate in spool of
circulation/pressure relief valve
clogged
•
Operating pressure is higher than
preset safety pressure
•
3 way directional control valve
connected as 4 way valve
•
Incorrect control spool installed
•
Electric power supply not correct
• Pump oil delivery too low
•
Solenoid is not switching
•
Spool of pressure reduction valve
jams
•
Control spool works stiffly
• Control spool works stiffly
Remedy
•
Clean
•
Check tie rod tightening
torque (30 Nm)
•
Remove and clean
•
Replace pressure pilot
valve unit
•
Replace O-ring
• Clean
•
Increase pressure setting
•
Replace valve
•
Replace spool
•
Check electric controller
• Check pump and suction
line
•
Check electric system
• Check solenoid
• Remove and clean
• Remove and clean
• Remove and clean
•
Check tie rod tightening
torque (30 Nm)
TIC
10/04